help please

Which of the following is not a chemical change? A) the condensation of water vapor B) dissolution of a penny in nitric acid C) a burning candle D) the rusting of iron Which of these atomic and/or molecular views represent pure substances? A) I and II B) All (1-IV) C) 1, II, and III D) I only Which one of the following is an intensive property? A) volume B) density C) surface area D) amount